"use strict";
const path = require("path");
const defaultSettings = require("./src/settings.js");
const webpack = require("webpack");
const CompressionPlugin = require("compression-webpack-plugin");
const BundleAnalyzerPlugin = require('webpack-bundle-analyzer').BundleAnalyzerPlugin;

function resolve(dir) {
  return path.join(__dirname, dir);
}

const name = defaultSettings.title || "齐明Java开发框架-前后端分离版"; // 标题

/**
 * 后台地址、本地启动的端口统一在根目录下的 .env.xxx 文件中配置
 * 其中 .env.development 为开发环境配置，.env.production 为生产环境配置，.env.staging 为测试环境配置
 */
const server = process.env.VUE_APP_SERVER; // 后台地址
const port = process.env.port || process.env.npm_config_port || 80; // 端口

// vue.config.js 配置说明，参考文档 https://cli.vuejs.org/zh/config/
module.exports = {
  // 部署生产环境和开发环境下的URL。
  publicPath: process.env.NODE_ENV === "production" ? "/" : "/",
  // 在npm run build 或 yarn build 时 ，生成文件的目录名称（要和baseUrl的生产环境路径一致）（默认dist）
  outputDir: "dist",
  // 用于放置生成的静态资源 (js、css、img、fonts) 的；（项目打包之后，静态资源会放在这个文件夹下）
  assetsDir: "static",
  // 是否开启eslint保存检测，有效值：ture | false | 'error'
  lintOnSave: process.env.NODE_ENV === "development",
  // 如果你不需要生产环境的 source map，可以将其设置为 false 以加速生产环境构建。
  productionSourceMap: false,
  // webpack-dev-server 相关配置，开发环境代理
  devServer: {
    // host: '0.0.0.0',
    port: port,
    open: true,
    proxy: {
      // detail: https://cli.vuejs.org/config/#devserver-proxy
      [process.env.VUE_APP_BASE_API]: {
        target: server,
        changeOrigin: true,
        pathRewrite: {
          ["^" + process.env.VUE_APP_BASE_API]: ""
        }
      },
      // smartform 代理，smartform那边打包出来的用于生产环境的包，所以是 /prod-api，
      // 当本项目部署于生产环境时也请保持生产环境的访问前缀为 /prod-api，这样nginx可统一代理
      ["/prod-api"]: {
        target: server,
        changeOrigin: true,
        pathRewrite: {
          ["^/prod-api"]: ""
        }
      }
    },
    // before: require('./mock/mock-server.js'),
    disableHostCheck: true
  },
  configureWebpack: {
    name: name,
    resolve: {
      alias: {
        "@": resolve("src")
      }
    },
    plugins: [
      /**
       * 参考文档：
       * https://www.npmjs.com/package/compression-webpack-plugin
       * https://webpack.docschina.org/plugins/compression-webpack-plugin/
       */
      new CompressionPlugin({
        filename: "[file].gz[query]", // 压缩后的文件名(保持原文件名，后缀加.gz)
        algorithm: "gzip", // 使用gzip压缩
        test: /\.js$|\.html$|\.css$/, // 匹配文件名
        threshold: 10240, // 对超过10k的数据压缩
        minRatio: 0.8, // 压缩率小于这个值的资源才会压缩
        deleteOriginalAssets: false // 是否删除未压缩的源文件，谨慎设置，如果希望提供非gzip的资源，可不设置或者设置为false（比如删除打包后的gz后还可以加载到原始资源文件）
      }),
      new webpack.ProvidePlugin({
        $: "jquery",
        jQuery: "jquery",
        "window.jQuery": "jquery"
      }),
      new BundleAnalyzerPlugin({
        analyzerMode: 'disabled',
        //analyzerMode: 'server',
        generateStatsFile: true,
        statsOptions: {
          source: false
        }
      }),
      new webpack.ProvidePlugin({
        'introJs': ['intro.js']
      })
    ]
  },
  chainWebpack(config) {
    config.plugins.delete("preload"); // TODO: need test
    config.plugins.delete("prefetch"); // TODO: need test

    const vueRules = config.module.rule("vue");
    const oldUses = new Map(vueRules.uses.store);

    vueRules.uses.clear();

    vueRules
      .use("qm-vue-loader")
      .loader(resolve("src/libs/rules/qm-vue-loader"))
      .end();

    if (oldUses) {
      oldUses.forEach((value, key) => {
        vueRules.uses.store.set(key, value);
      });
    }
    // set svg-sprite-loader
    config.module
      .rule("svg")
      .exclude.add(resolve("src/assets/icons"))
      .end();
    config.module
      .rule("icons")
      .test(/\.svg$/)
      .include.add(resolve("src/assets/icons"))
      .end()
      .use("svg-sprite-loader")
      .loader("svg-sprite-loader")
      .options({
        symbolId: "icon-[name]"
      })
      .end();

    config.when(process.env.NODE_ENV !== "development", config => {
      config
        .plugin("ScriptExtHtmlWebpackPlugin")
        .after("html")
        .use("script-ext-html-webpack-plugin", [{
          // `runtime` must same as runtimeChunk name. default is `runtime`
          inline: /runtime\..*\.js$/
        }])
        .end();
      config.optimization.splitChunks({
        chunks: "all",
        maxSize: 1024 * 1024,
        cacheGroups: {
          libs: {
            name: "chunk-libs",
            test: /[\\/]node_modules[\\/]/,
            priority: 10,
            chunks: "initial" // only package third parties that are initially dependent
          },
          elementUI: {
            name: "chunk-elementUI", // split elementUI into a single package
            priority: 20, // the weight needs to be larger than libs and app or it will be packaged into libs or app
            test: /[\\/]node_modules[\\/]_?element-ui(.*)/ // in order to adapt to cnpm
          },
          commons: {
            name: "chunk-commons",
            test: resolve("src/components"), // can customize your rules
            minChunks: 3, //  minimum common number
            priority: 5,
            reuseExistingChunk: true
          }
        }
      });
      config.optimization.runtimeChunk("single"), {
        from: path.resolve(__dirname, "./public/robots.txt"), //防爬虫文件
        to: "./" //到根目录下
      };
    });
  },
};
